Free report shows the number of autocomplete list cache entries in NK2, DAT, XML files. Detailed report shows the full set of auto-complete data available. This report will help to get a list of contacts from the Auto-Complete List files. In Outlook 2007/2003, Auto-Complete Lists are stored in NK2 files. In Outlook 2010+, Auto-Complete Lists are stored in mailboxes and PST files, and in the DAT files for compatibility with older applications.